Stepper Motor Phasing - Aerotech Ensemble CL Hardware Manual

Installation and Configuration

2.2.3.1. Stepper Motor Phasing

A stepper motor can be run with or without an encoder. If an encoder is not being used, phasing is not
necessary. With an encoder, test for proper motor phasing by running a positive motion command.
If there is a positive scaling factor (determined by the CountsPerUnit
clockwise direction, as viewed looking at the motor from the front mounting flange, the motor is phased
correctly. If the motor moves in a counterclockwise direction, swap the motor leads and re-run the
command.
Proper motor phasing is important because the end of travel (EOT) limit inputs are relative to motor rotation.
N O T E : If using standard Aerotech motors and cables, motor and encoder connection adjustments are
not required.
N O T E : After the motor has been phased, use the ReverseMotionDirection
ection of "positive" motion.
1
CountsPerUnit has replaced PosScaleFactor in software version 3.00.000.
2
ReverseMotionDirection has replaced the functionality of reversing the sign on the PosScaleFactor to
change the direction of positive motion in software version 3.00.000.
www.aerotech.com
ROTARY MOTOR
Motor Mounting
Flange (Front View)
POSITIVE MOTION
Figure 2-14: Clockwise Motor Rotation
Chapter 2
1
parameters) and the motor moves in a
Motor Shaft
2
parameter to change the dir-
Ensemble CL
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